BF3 lag

[chipachap]

thanks for that info humbug, my cpu usage stays at around 98%. i have 8gb of ram arriving in the morning so maybe that'l help, if not then i guess im just gonna wait for amd piledriver to be released and grab myself a new mobo and cpu

If your CPU usage is at 98% then there's nothing you can do I'm afraid. If you're willing to upgrade an i5 is your best value option.

 

[Martini1991]

thanks for that info humbug, my cpu usage stays at around 98%. i have 8gb of ram arriving in the morning so maybe that'l help, if not then i guess im just gonna wait for amd piledriver to be released and grab myself a new mobo and cpu

Best off going i5.
That's a CPU bottleneck.

 

[casual123]

If your CPU usage is at 98% then there's nothing you can do I'm afraid. If you're willing to upgrade an i5 is your best value option.

ah that sucks, its only bf3 that im bottlenecking in really though, other games are fine, i cant really afford to go the intel route, plus ive always stuck to amd, one of the newer pile drivers should cope fine? thinking of getting one of the six core ones when theyre released

 

[Martini1991]

You'll be bottlenecking in other games too, just you'll be running very high frame rates that it's not noticeable at all.
Vishera's still an unknown quantity, the 6 core will probably be comparable to a high clocking Phenom II X6.

Your best upgrade is Intel quite purely and simple.

 

[humbug]

I'm working on it, i have some results which i will put in a separate thread, stay tuned

 

[humbug]

Interesting, unless your 6850 xfire is more powerful than my 7870 running at a 20% overclock it does not seem you would be bottlenecking @ 3.6Ghz http://forums.overclockers.co.uk/showthread.php?p=22878624#post22878624

Unless it has something to do with xFire something else is going on, but overclocking that CPU some more might help, and as has been said before, dump as much of the work onto the GPU as you can.

 

[Martini1991]

6850 Crossfire is akin to a 5970.
Although by his CPU usage saying 98%, that is a bottleneck.
So there's obviously some issue with his CPU maxing out.

 

[humbug]

6850 Crossfire is akin to a 5970.
Although by his CPU usage saying 98%, that is a bottleneck.
So there's obviously some issue with his CPU maxing out.

That's to difficult to work out. According to this the stock 7870 is 70% ahead of the stock 6850 in Bf3, i'm also running a 20% overclock.

It would need some big xfire scaling

http://www.anandtech.com/bench/Product/539?vs=548

 

[Martini1991]

70% isn't that high for Crossfire scaling, and 20% overclock won't result in a total of 20% performance increase, so it's not a simple case of if 90% scaling then same.
5970 at 1920x1080 gets 80 FPS on BF3, 7870 gets 60 according to Anandtech.

 

[humbug]

70% isn't that high for Crossfire scaling, and 20% overclock won't result in a total of 20% performance increase, so it's not a simple case of if 90% scaling then same.
5970 at 1920x1080 gets 80 FPS on BF3, 7870 gets 60 according to Anandtech.

It's not a 5790, it's 2 6850's, for 2 6850 to get 80 FPS on BF3 the xFire scaling would need to be 120%, that's impossible

 

[chipachap]

ah that sucks, its only bf3 that im bottlenecking in really though, other games are fine, i cant really afford to go the intel route, plus ive always stuck to amd, one of the newer pile drivers should cope fine? thinking of getting one of the six core ones when theyre released

TBH, unless Pile Driver is a HUGE improvement over Fail Dozer you'll end up costing yourself money in the long run, Intel CPU's are a long shot ahead of AMD's this gen.

If you plan on keeping 2 cards in future I'd suggest a 2600k or anyone with more than 4 cores as games will start using more and more cores especially when next consoles come out. The AMD counterparts really do fall behind performance wise.

 

[old gamer]

I still think it needs a higher res monitor than 1680x1050 to alow the 6850's room to stretch there legs

 

[casual123]

gonna bring this thread back up instead of making another, would a AMD Phenom II X6 1055T 2.8GHz be decent? might be able to get one for £75, With a bit of overclocking will it get rid of bottleneck and last me a few years? cheers

 

[no_1_dave]

Get more system ram.
4GB system ram is not enough for crossfire. You are getting lag spikes because of HDD caching.

 

[casual123]

Get more system ram.
4GB system ram is not enough for crossfire. You are getting lag spikes because of HDD caching.

I have, im running 8gb now, have been for about a week now I'm getting lag spikes mainly because of my cpu bottleneck as ive seen using msi afterburner. I just need to know if a 1055t would be sufficent

 

[eddyr]

If you are maxing out your cpu at 98% utilisation, this should help, try capping fps through the ingame console using gametime.maxvariablefps xx
Choose an fps below your reported averages.





A screenshot of cpu usage running about the base. Initially uncapped avg fps varies between 55-65 with cpu usage hovering at 70%, then limited to 45 fps where cpu usage drops to ~40%, and then about halfway through to 30 fps with a further few % drop.

edit: it does spike up in battle but only by about 10% in the 45fps cap instance.